Kinetics of oxygen absorption by aqueous electrolyte solutions in the presence of microencapsulated quartz particles activating the mass transfer in the liquid phase

Kinetics of oxygen absorption by aqueous electrolyte solutions in the presence of...
Kazakov, D.; Vol’khin, V.; Borovkova, I.; Popova, N.
2014-03-28 00:00:00
Effect of the ion composition of aqueous solutions on the oxygen absorption kinetics in a system constituted by a gas (air) and a liquid (aqueous solution) in the presence of microencapsulated quartz particles activating the mass transfer in the liquid phase was studied. It was found that ions with positive hydration cause a substantial decrease in the O2 mass-transfer enhancement factor, whereas ions with negative hydration lead to its increase under the same conditions. It is shown that the effect of ions on the rate of oxygen absorption by aqueous electrolyte solutions can be prognosticated on the basis of data on the influence of these ions on the structure and viscosity of water. The results of the study can serve as a basis for varying the rate of heterogeneous reactions in gas-liquid systems, whose rate is limited by the mass transfer of oxygen into aqueous media, by purposeful control over their ion composition.
http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.pngRussian Journal of Applied ChemistrySpringer Journalshttp://www.deepdyve.com/lp/springer-journals/kinetics-of-oxygen-absorption-by-aqueous-electrolyte-solutions-in-the-KrAdAKpolE

Kinetics of oxygen absorption by aqueous electrolyte solutions in the presence of microencapsulated quartz particles activating the mass transfer in the liquid phase

Abstract

Effect of the ion composition of aqueous solutions on the oxygen absorption kinetics in a system constituted by a gas (air) and a liquid (aqueous solution) in the presence of microencapsulated quartz particles activating the mass transfer in the liquid phase was studied. It was found that ions with positive hydration cause a substantial decrease in the O2 mass-transfer enhancement factor, whereas ions with negative hydration lead to its increase under the same conditions. It is shown that the effect of ions on the rate of oxygen absorption by aqueous electrolyte solutions can be prognosticated on the basis of data on the influence of these ions on the structure and viscosity of water. The results of the study can serve as a basis for varying the rate of heterogeneous reactions in gas-liquid systems, whose rate is limited by the mass transfer of oxygen into aqueous media, by purposeful control over their ion composition.